如图,抛物线的图像与x轴交于A,B两点,与y轴交于点
,该抛物线的顶点C的坐标为
.
(2)若点E为该抛物线的对称轴上的一个动点,在什么情况下,
的周长最小;
(3)已知
上的点F 在直线
的下方, 且
,求点F的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77342c72ea434f01b5a6d14761f468e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd36ab076c3a68433ec1667cd61987b.png)
(2)若点E为该抛物线的对称轴上的一个动点,在什么情况下,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1aa98b33284a0869a33ad7bb9c6456.png)
更新时间:2024-04-15 12:24:16
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解答题-问答题
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【推荐1】已知抛物线
的图象与x轴有两个公共点.
(1)求m的取值范围,写出当m取其范围内最大整数时抛物线的解析式;
(2)将(1)中所求得的抛物线记为
,
①求
的顶点P的坐标;
②若当
时,y的取值范围是
,求n的值;
(3)将
平移得到抛物线
,使
的顶点Q落在以原点为圆心半径为
的圆上,求点P与Q两点间的距离最大时
的解析式,怎样平移
可以得到所求抛物线?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3569112487b687cf958391605da6f1a.png)
(1)求m的取值范围,写出当m取其范围内最大整数时抛物线的解析式;
(2)将(1)中所求得的抛物线记为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
②若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a306fdd4ac55fbf66c0df974fc3741e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3202b64a0040b7dcb481dab1d4d0506.png)
(3)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
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【推荐2】如图,抛物线y=ax2+bx﹣2a与x轴交于点A和点B(1,0),与y轴将于点C(0,﹣
).
(1)求抛物线的解析式;
(2)若点D(2,n)是抛物线上的一点,在y轴左侧的抛物线上存在点T,使△TAD的面积等于△TBD的面积,求出所有满足条件的点T的坐标;
(3)直线y=kx﹣k+2,与抛物线交于两点P、Q,其中在点P在第一象限,点Q在第二象限,PA交y轴于点M,QA交y轴于点N,连接BM、BN,试判断△BMN的形状并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
(1)求抛物线的解析式;
(2)若点D(2,n)是抛物线上的一点,在y轴左侧的抛物线上存在点T,使△TAD的面积等于△TBD的面积,求出所有满足条件的点T的坐标;
(3)直线y=kx﹣k+2,与抛物线交于两点P、Q,其中在点P在第一象限,点Q在第二象限,PA交y轴于点M,QA交y轴于点N,连接BM、BN,试判断△BMN的形状并证明你的结论.
![](https://img.xkw.com/dksih/QBM/2019/10/17/2313874056716288/2314837246435328/STEM/e97494480f464ba39415e02806134e85.png?resizew=332)
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【推荐1】已知,在平面直角坐标系中,抛物线
(m为常数)的顶点为D.
(1)求顶点D的坐标.(用含m的式子表示)
(2)连接OD,若OD与x轴所夹锐角为45°,求m的值.
(3)在(2)的条件下,若
,点P在y轴上,将点P向右平移4个单位长度得到点Q,若线段PQ与此抛物线只有一个交点,请直接写出点Q的纵坐标
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f892fca0757b827243b96cc105fd13a8.png)
(1)求顶点D的坐标.(用含m的式子表示)
(2)连接OD,若OD与x轴所夹锐角为45°,求m的值.
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26326b7b41b5c95982ae1b20e71cf6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80ce24d4a9093f99b47eb97913e71d3.png)
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【推荐2】已知关于
的二次函数
.
(1)该函数的图象与
轴只有一个交点,求
与
之间的关系;
(2)若
,当
时,
随
的增大而增大,求
的范围;
(3)当
,
,该图象不经过第三象限,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f0a46b1af178af9c64890a1a58d409.png)
(1)该函数的图象与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752455799e49f846e2601304fec5d3b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6aeba88a67720f9b5a83a25701dc5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3bf549381651d717e07bb8eda1d5121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】如图所示,AB=AC=12,BC=7,AB的垂直平分线交AB于D,交AC于E,求△BCE的周长.
![](https://img.xkw.com/dksih/QBM/2017/12/1/1829271988092928/1830490710859776/STEM/4dfb4a9e27304c86973ddfe39ed62b5d.png?resizew=146)
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【推荐2】如图,点P在
内部,点P关于
、
对称的点分别为C、D,连接
交
于点R,连接
交
于点T,连接
,交
于点M,交
于点N,连接
、
.
(1)若
,求
的周长;
(2)若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/16/dd8f2a73-06df-4a80-9b6a-79cece1c5be5.png?resizew=147)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/917fe7e5e27e0be03291e16a63a0f86f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81131259f548e8803da8dec25fb644c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41bf402a6b6d9fb3cc72babdb8dc6318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
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【推荐1】如图1,E是等边
ABC的边BC上一点(不与点B,C重合),连接AE,以AE为边向右作等边
AEF,连接CF.已知
ECF的面积(S)与BE的长(x)之间的函数关系如图2所示(P为抛物线的顶点)﹒
(1)当
ECF的面积最大时,求∠FEC的度数;
(2)求等边
ABC的边长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(2)求等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/4/667cd6c0-b60a-4847-af8e-36e9c2cf31f7.png?resizew=396)
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【推荐2】如图,在平面直角坐标系中,点
为坐标原点,直线
与
轴,
轴分别交于
两点,抛物线
经过点
,对称轴为直线
.
![](https://img.xkw.com/dksih/QBM/2022/1/12/2892845248102400/2948892408274944/STEM/c4dc9844-3e3d-4f50-a699-f4bcb3c708a7.png?resizew=244)
(1)求
值;
(2)
是直线
上方抛物线上任意一点,设点
的横坐标为
,
的面积为
,求
与
之间的函数关系式,并写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae652daf6059ff386f99bef2210518c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://img.xkw.com/dksih/QBM/2022/1/12/2892845248102400/2948892408274944/STEM/c4dc9844-3e3d-4f50-a699-f4bcb3c708a7.png?resizew=244)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a871db2bd253dec3d9e78fd567129a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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